Thanks for reporting this.
Work on this issue had started a few months ago but has since gone stale. I invite you to read and chime in at removed info = _simplify_info(info) from make_lcmv by neurosignal · Pull Request #11403 · mne-tools/mne-python · GitHub to help get things going again!
Also see Problem with correct rank detection in make_LCMV due to _simplify_info
Good luck,
Richard